[WIP] Fix violations in opentelemetry-instrumentation-system-metrics

[Copilot]

• Understand the current implementation of gc_count metrics
• Research the semantic conventions for cpython.gc metrics in the opentelemetry-python repository
• Add opentelemetry-semantic-conventions as a dependency in pyproject.toml
• Update the init.py to import semantic conventions
• Replace the single process.runtime.gc_count metric with three separate cpython.gc metrics: collections, collected_objects, uncollectable_objects
• Update _get_runtime_gc_count method to use gc.get_stats() instead of gc.get_count()
• Change the attribute name from "count" to use CPYTHON_GC_GENERATION constant
• Update DEFAULT_CONFIG to include the new metric names
• Update tests to reflect the new metric names and attributes
• Run tests to verify the changes work correctly
• Run code review to ensure quality
• Run security scan

Original prompt

Please look at the following report and open a pr to fix the violations listed there in opentelemetry-instrumentation-system-metrics package that is inside the instrumentation dir. On that instrumentation the name of the attributes are taken from the opentelemetry-semantic-conventions package, so you should grep https://github.com/open-telemetry/opentelemetry-python/tree/main/opentelemetry-semantic-conventions/ to get the variable name referenced in the opentelemetry-instrumentation-system-metrics package.

Here's the report:

Metric cpython.gc.collections counter, {collection}
- [improvement] Metric 'cpython.gc.collections' is not stable; stability = development.
Data point 125
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 0
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')
Data point 11
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 1
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')
Data point 1
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 2
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')

Metric cpython.gc.collected_objects counter, {object}
- [improvement] Metric 'cpython.gc.collected_objects' is not stable; stability = development.
Data point 601
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 0
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')
Data point 78
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 1
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')
Data point 20
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 2
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')

Metric cpython.gc.uncollectable_objects counter, {object}
- [improvement] Metric 'cpython.gc.uncollectable_objects' is not stable; stability = development.
Data point 0
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 0
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')
Data point 0
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 1
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')
Data point 0
- [violation] Required attribute 'cpython.gc.generation' is not present.
generation = 2
- [violation] Attribute 'generation' does not exist in the registry.
- [improvement] Attribute name 'generation' must include a namespace (e.g. '{namespace}.{attribute_key}')

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